I'm buying a 5.9 Severne S1 sail from 2008 for my 6-months old Kombat 105. Question is: do I really have to spend so much for a Severne mast, or can I sail it on my Amex RDM 430 75% t-bone mast?

my understanding is Amex wave masts aren't constant curve, so should be compatible for Severne?? not sure... anyone has some feedback on this? sorry to open yet another thread on this subject, but really can't spend another 400 bucks on another mast and gotta make up my mind soon